http://www.pclinuxos.com/forum/index.php/topic,83752.msg708148.html#msg708148add -- options snd slots=snd_hda_intel,snd_usb_audio -- to your /etc/modprobe.conf file (as root)
Possible solution, plus open your mixer channel settings, move all options from the left to the right, on by one, all sliders to the max.
Testing.
Hope this helps
